I must say, these problems of yours are some cumbersome. I'm not sure they are teaching much about factoring, since most of them only have a single monomial common factor. Like this one:
48x^3 - 128x^2 -56x -16
8(6x^3-16x^2-7x-2)
48x^3 - 128x^2 -56x -16
please help. Poloynomials
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